Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd2ac0a77fcc0eb…

MALICIOUS

PDF

108.2 KB Created: 2021-04-17 05:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f962de80779c8282f88989872bd73d7f SHA-1: e6a9c7cb00b58fb4ccb640c062bb7a7542145332 SHA-256: afd2ac0a77fcc0eb136e2cc9289fa21121015e469de268302a9a403372a8edf8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/strik?utm_term=intervencion+en+crisis+psicologica+pasos PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465257/normal_5fffb4a23254a.pdfIn PDF document text
    • http://kobopez.mygamesonline.org/dusavurilisez.pdfIn PDF document text
    • http://xarapover.mygamesonline.org/integral_calculus_by_shanti_narayan_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_601a7f1349ad2.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/calidad_en_salud_definicion.pdfIn PDF document text
    • http://natosabi.mygamesonline.org/judababipageguxerikopem.pdfIn PDF document text
    • http://wififej.mypressonline.com/wulewuzibuwutafexiwifupil.pdfIn PDF document text
    • http://vogolimipogusoz.mypressonline.com/ac_dc_back_in_black_guitar_tab.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/45332903206.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/ragudeve.pdfIn PDF document text
    • http://rexuwoxaga.sportsontheweb.net/mother_goose_nursery_rhymes_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419633/normal_6042b56cf112b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487005/normal_6000a0068c6f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuzuwukef.atwebpages.com/intel_dx58s02_bios_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/727ca15d-4d6a-485b-a2bf-63db834ddaa6/how_to_start_coleman_powermate_10_hp_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/lagu_blackpink_whistle_acoustic_korean_ver.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/mifipumawoladekenokizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd4c1744-a4f2-4165-a07b-bcc3b7d4b216/lozexibujugamakeduru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/773a4aaa-8901-41b2-82f3-1d5be76c4aa7/pulefetisesomemas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/806a3f84-2760-4e63-9129-0f53b1d0b9d7/thinkpad_t430_9_cell_battery_life.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/casio_g_shock_g7900-1_manual.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16930 5100 bytes
SHA-256: 7a82e4555b9ec8a9b8e8f589e88f18ee280a54b04f46b66da76defe8df377fca
font_01_sfnt_off00017aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AA5 12020 bytes
SHA-256: d96fb725c6d06981207f5c9daa3ceb446227f91c8b7fa6cb5f627f101da6bc27

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